CN104177818A - Preparation method of low-internal-loss medium-resistant polyurethane elastomer material for vibration isolators - Google Patents
Preparation method of low-internal-loss medium-resistant polyurethane elastomer material for vibration isolators Download PDFInfo
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- CN104177818A CN104177818A CN201410400930.6A CN201410400930A CN104177818A CN 104177818 A CN104177818 A CN 104177818A CN 201410400930 A CN201410400930 A CN 201410400930A CN 104177818 A CN104177818 A CN 104177818A
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Abstract
一种隔振器用低内耗、耐介质聚氨酯弹性体材料的制备方法，该制备方法包含制备聚氨酯生胶、制备混合胶料、制备聚氨酯弹性体材料三个步骤，聚氨酯生胶含聚醚多元醇或聚酯多元醇、芳香族有机二异氰酸酯和甘油α-烯丙基醚，混合胶料含补强填料、硫化剂和促进剂，将制备出的混合胶料经出片、剪裁后放入金属模具中并在热压成型机上进行加热、加压硫化成型，加热温度控制在130~150℃，加压压力控制在8~12MPa，硫化成型时间控制在25~50min后即可制备出聚氨酯弹性体材料，消除了由于分子链不对称而导致的内耗增大因素，改善和提高了聚氨酯弹性体材料的耐介质性能。
A method for preparing a low internal friction and medium-resistant polyurethane elastomer material for a vibration isolator. The preparation method includes three steps: preparing polyurethane raw rubber, preparing a mixed rubber material, and preparing a polyurethane elastomer material. The polyurethane raw rubber contains polyether polyol or Polyester polyol, aromatic organic diisocyanate and glycerol α-allyl ether. The mixed rubber contains reinforcing fillers, vulcanizing agents and accelerators. The prepared mixed rubber is put into a metal mold after being sliced and cut. The polyurethane elastomer material can be prepared after heating and pressurizing vulcanization molding on a hot press molding machine. The heating temperature is controlled at 130~150°C, the pressurized pressure is controlled at 8~12MPa, and the vulcanization molding time is controlled at 25~50min. , Eliminate the internal friction increase factor caused by molecular chain asymmetry, improve and enhance the medium resistance of polyurethane elastomer materials.
Description
Technical field
The invention belongs to technical field of material, the preparation method of especially a kind of low in-fighting for vibration isolator, media-resistant polyurethane elastomer material.
Background technology
Rubber shock absorber is a most widely used class vibration isolator, has compact construction, good manufacturability, low cost and other advantages, can, according to the structural requirement of load bearing equipment, be sulfided into geometrical shape arbitrarily.Be generally adaptation applied environment, adopt paracril, the natural rubber of oil resistance excellence more.But along with the rubber shock absorber prolongation of duration of service, will occur the phenomenon such as material aging, performance degradation, and cause the work-ing life of rubber shock absorber shorter, be only within 7 ~ 10 years, just to occur various forms of inefficacies.
In addition, because the bin aging phenomenon of rubber shock absorber is very serious, further shorten its work-ing life, even some rubber shock absorbers just lost efficacy before installing, must safeguard in time and change once rubber shock absorber loses efficacy, otherwise will directly affect the security of equipment, and have problems such as difficulty is large, expense is high, maneuvering ability is poor while changing.
Also have and adopt using TDI and MDI as reaction raw materials, synthesize casting type polyurethane elastomer material and manufactured urethane vibration isolator, casting PU vibration isolator is larger than rubber shock absorber supporting capacity, carrying wide ranges, the little and good damping result of springrate ratio value, but the in-fighting of casting type polyurethane elastomer material is larger, heat-dissipating is serious, cause its ageing-resistant performance deficiency, had a strong impact on the performance of casting PU vibration isolator, make its application obtain certain limitation.
Summary of the invention
For above existing problems, the invention provides the preparation method of low in-fighting for a kind of vibration isolator, media-resistant polyurethane elastomer material, the method has prepared that a kind of mechanical property excellence, in-fighting are low, the vibration isolator polyurethane elastomer material of media-resistant, and the moulding process of this polyurethane elastomer material is simple, can significantly improve the properties of vibration isolator.
For achieving the above object, the present invention adopts following technical scheme:
The preparation method of low in-fighting for a kind of vibration isolator, media-resistant polyurethane elastomer material, this preparation method comprises and prepares urethane rubber, prepares blend glue stuff, prepares three steps of polyurethane elastomer material, in urethane rubber, use vacuum drying oven and there-necked flask preparing, in blend glue stuff, use mill preparing, use metal die and heat pressing forming machines preparing in polyurethane elastomer material, concrete steps are as follows:
Prepare urethane rubber: the pre-treatment of dewatering of the polyether glycol that is first 1000 ~ 3000 to molecular weight or polyester polyol, more than carrying out vacuum hydro-extraction 2h afterwards in 100 ~ 120 DEG C of vacuum drying ovens, after vacuum hydro-extraction by the polyether glycol of 100 weight parts or the polyester polyol of 100 weight parts is placed in the there-necked flask of 75 ~ 115 DEG C of oil baths, to described there-necked flask, to pass into purity be 99.9% nitrogen and stir under the rotating speed of 100 ~ 300rad/min, in whipping process, add the aromatic series organic diisocyanate of 10 ~ 33 weight parts and increase stirring velocity to 500 ~ 1000rad/min and make both hybrid reactions even, after described hybrid reaction to 30 ~ 50min, add again the glycerine α-allyl ethers of 2 ~ 6.5 weight fraction and continue reaction 20 ~ 30min and poured out, be positioned over and in the baking oven of 100 ~ 120 DEG C, heat 6h and can prepare above urethane rubber,
Prepare blend glue stuff: in the urethane rubber of 100 weight parts, add reinforced filling, the vulcanizing agent of 2 ~ 5 weight parts and the promotor of 5 ~ 10 weight parts of 20 ~ 50 weight parts and in mill, carry out the mixing blend glue stuff of evenly can preparing;
Above-mentioned reinforced filling or hard(carbon)black, or semi-reinforcing hydrocarbon black, or gas-phase silica;
Above-mentioned vulcanizing agent is powder-sulphur;
Above-mentioned promotor or vulkacit D, or captax;
Prepare polyurethane elastomer material: by the blend glue stuff of preparing through slice, put into metal die after cutting out and on heat pressing forming machines, heat, press vulcanization moulding, heating and temperature control is at 130 ~ 150 DEG C, moulding pressure is controlled at 8 ~ 12MPa, and the sulfidization molding time can be prepared polyurethane elastomer material after being controlled at 25 ~ 50min.
Above-mentioned polyether glycol or PTMG, or polyoxypropylene polyol.
Above-mentioned polyester polyol or polycarbonate polyol, or polycaprolactone polyol.
Above-mentioned aromatic series organic diisocyanate is 1,5-naphthalene diisocyanate.
By above technical scheme, can reach following technique effect:
1, the mechanical property of this polyurethane elastomer material, water-fast, oil resistance is excellent, and damping tan δ <0.2 in-fighting is little, is applicable to vibration isolator material of main part.
2, preparation method's simple possible, can meet the requirement of practical engineering application to material property.
Brief description of the drawings
fig. 1 is the simplified schematic diagram that is related to of the dissipation factor of polyurethane elastomer material of the present invention and vibrational frequency.
Embodiment
Following table embodiment 1-3 is the formula ratio of preparing urethane rubber.
PTMG PTMG is vacuumized at 120 DEG C after dehydration 2h; by upper table formula ratio by PTMG and be placed in the there-necked flask of 100 DEG C of oil baths under nitrogen protection; under the rotating speed of 200rad/min, add 1; 5-naphthalene diisocyanate NDI; increase stirring velocity to 1000rad/min; make NDI in PTMG, mix and react; after hybrid reaction 30min, add again glycerine α-allyl ethers as chainextender, continue reaction and product is poured out and is placed in after 20min after the baking oven of 120 DEG C is processed 6h and obtain the synthetic rubber of urethane.
Following table embodiment 4-6 is the formula ratio of preparing blend glue stuff.
Vulkacit D or captax are trade(brand)name.In mill mixing evenly after and pack in metal die and on heat pressing forming machines through slice, after cutting out heat, press vulcanization moulding, heating and temperature control is at 135 DEG C, moulding pressure is controlled at 10MPa, and the sulfidization molding time is controlled at 40min, prepares polyurethane elastomer material.
Its mechanical property of polyurethane elastomer material of the present invention and medium-resistance see the following form.
As can be seen from Figure 1: its dissipation factor of polyurethane elastomer material prepared by the present invention is in the range of frequency of 10 ~ 300Hz, its dissipation factor tan δ <0.2, the internal energy that polyurethane elastomer material is described dissipates less, in-fighting is lower, thereby heat-dissipating is less, material is ageing-resistant will be improved greatly with dynamic fatigue property, be suitable as the material of vibration isolator, selected aromatic series organic diisocyanate is 1 of compound with regular structure on the one hand, 5-naphthalene diisocyanate, has eliminated the factor that the in-fighting that causes because molecular chain is asymmetric increases; Adopt on the other hand the prepared method of the present invention, can effectively control the preparation process of urethane rubber, reducing side reaction occurs, thereby guarantee regularity and the higher molecular weight of molecular chain, not only make polyurethane elastomer material in-fighting lower, also improved the medium-resistance of polyurethane elastomer material simultaneously.
Claims (4)
1. the preparation method of a low in-fighting for vibration isolator, media-resistant polyurethane elastomer material, this preparation method comprises and prepares urethane rubber, prepares blend glue stuff, prepares three steps of polyurethane elastomer material, in urethane rubber, use vacuum drying oven and there-necked flask preparing, in blend glue stuff, use mill preparing, use metal die and heat pressing forming machines preparing in polyurethane elastomer material, it is characterized in that:
Prepare urethane rubber: the pre-treatment of dewatering of the polyether glycol that is first 1000 ~ 3000 to molecular weight or polyester polyol, more than carrying out vacuum hydro-extraction 2h afterwards in 100 ~ 120 DEG C of vacuum drying ovens, after vacuum hydro-extraction by the polyether glycol of 100 weight parts or the polyester polyol of 100 weight parts is placed in the there-necked flask of 75 ~ 115 DEG C of oil baths, to described there-necked flask, to pass into purity be 99.9% nitrogen and stir under the rotating speed of 100 ~ 300rad/min, in whipping process, add the aromatic series organic diisocyanate of 10 ~ 33 weight parts and increase stirring velocity to 500 ~ 1000rad/min and make both hybrid reactions even, after described hybrid reaction to 30 ~ 50min, add again the glycerine α-allyl ethers of 2 ~ 6.5 weight fraction and continue reaction 20 ~ 30min and poured out, be positioned over and in the baking oven of 100 ~ 120 DEG C, heat 6h and can prepare above urethane rubber,
Prepare blend glue stuff: in the urethane rubber of 100 weight parts, add reinforced filling, the vulcanizing agent of 2 ~ 5 weight parts and the promotor of 5 ~ 10 weight parts of 20 ~ 50 weight parts and in mill, carry out the mixing blend glue stuff of evenly can preparing;
Above-mentioned reinforced filling or hard(carbon)black, or semi-reinforcing hydrocarbon black, or gas-phase silica;
Above-mentioned vulcanizing agent is powder-sulphur;
Above-mentioned promotor or vulkacit D, or captax;
Prepare polyurethane elastomer material: by the blend glue stuff of preparing through slice, put into metal die after cutting out and on heat pressing forming machines, heat, press vulcanization moulding, heating and temperature control is at 130 ~ 150 DEG C, moulding pressure is controlled at 8 ~ 12MPa, and the sulfidization molding time can be prepared polyurethane elastomer material after being controlled at 25 ~ 50min.
2. a preparation method for low in-fighting for vibration isolator, media-resistant polyurethane elastomer material, is characterized in that: polyether glycol or PTMG, or polyoxypropylene polyol.
3. a preparation method for low in-fighting for vibration isolator, media-resistant polyurethane elastomer material, is characterized in that: polyester polyol or polycarbonate polyol, or polycaprolactone polyol.
4. a preparation method for low in-fighting for vibration isolator, media-resistant polyurethane elastomer material, is characterized in that: aromatic series organic diisocyanate is 1,5-naphthalene diisocyanate.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106432682A (en) * | 2016-09-06 | 2017-02-22 | 东莞华工佛塑新材料有限公司 | Preparation method of polyurethane raw rubber for mixed polyurethane elastomer |
| CN107325261A (en) * | 2017-08-29 | 2017-11-07 | 杭州重力脚轮科技有限公司 | A kind of 1,5 naphthalene diisocyanate type polyurethane elastomers and its preparation method and application |
| CN107868223A (en) * | 2016-11-22 | 2018-04-03 | 沈阳赛亚橡胶制品有限公司 | A kind of hydrolysis resistant polyurethane rubber and preparation method thereof |
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| CN101486890A (en) * | 2008-04-30 | 2009-07-22 | 上海工程技术大学 | Anstatic agent and antistatic urethane elastomer material thereof |
| US20120225738A1 (en) * | 2010-06-30 | 2012-09-06 | Nike, Inc. | Golf Balls Including Crosslinked Thermoplastic Polyurethane |
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Patent Citations (3)
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| CN101486890A (en) * | 2008-04-30 | 2009-07-22 | 上海工程技术大学 | Anstatic agent and antistatic urethane elastomer material thereof |
| CN102803331A (en) * | 2010-01-22 | 2012-11-28 | 路博润高级材料公司 | Crosslinkable thermoplastic polyurethane |
| US20120225738A1 (en) * | 2010-06-30 | 2012-09-06 | Nike, Inc. | Golf Balls Including Crosslinked Thermoplastic Polyurethane |
Non-Patent Citations (1)
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| 孙雁和余胜全: "混炼型聚氨酯橡胶的加工成型", 《特种橡胶制品》, vol. 15, no. 3, 31 December 1994 (1994-12-31), pages 45 - 48 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106432682A (en) * | 2016-09-06 | 2017-02-22 | 东莞华工佛塑新材料有限公司 | Preparation method of polyurethane raw rubber for mixed polyurethane elastomer |
| CN106432682B (en) * | 2016-09-06 | 2017-12-15 | 东莞华工佛塑新材料有限公司 | A kind of preparation method of blending-type polyurethane elastomer polyurethane rubber |
| CN107868223A (en) * | 2016-11-22 | 2018-04-03 | 沈阳赛亚橡胶制品有限公司 | A kind of hydrolysis resistant polyurethane rubber and preparation method thereof |
| CN107325261A (en) * | 2017-08-29 | 2017-11-07 | 杭州重力脚轮科技有限公司 | A kind of 1,5 naphthalene diisocyanate type polyurethane elastomers and its preparation method and application |
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